Local environment of W and Mo atoms in CaW1-xMoxO4 (x = 0.12) solid solution studied by X-ray structural analyzes

Mamoru Kitaura, Kei Kamada, Naohisa Happo, Koji Kimura, Kouichi Hayashi, Hisanori Yamane, Toshiaki Ina, Shinta Watanabe, Manabu Ishizaki, Akimasa Ohnishi

Research output: Contribution to journalArticle

Abstract

The local environment of W and Mo atoms in CaW1-xMoxO4 (x = 0.12) solid solution (mixed crystal) scintillator crystal was analyzed by X-ray diffraction (XD), extended X-ray absorption fine structure (EXAFS), and X-ray fluorescence holography (XFH). The XD analysis revealed that W and Mo atoms occupy the same crystallographic site. The analyzes of XFH and EXAFS exhibited that the local environment of Mo atoms is different from that of W atoms. Atomic images of neighbor atoms around the Mo and W atoms were reconstructed using their positional fluctuations. The positional fluctuation of the W atoms was apparently larger than that of Mo atoms. This feature explained the absence of the peak due to next nearest neighbor O atoms around W atoms in the Fourier transfer magnitudes for the W-L 3 edge EXAFS spectrum. It is, therefore, most likely that the different positional fluctuations of the Mo and W atoms are responsible for different atomic images of neighbor atoms between them.

Original languageEnglish
Article number120602
JournalJapanese journal of applied physics
Volume58
Issue number12
DOIs
Publication statusPublished - 2019 Jan 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Local environment of W and Mo atoms in CaW<sub>1-x</sub>Mo<sub>x</sub>O<sub>4</sub> (x = 0.12) solid solution studied by X-ray structural analyzes'. Together they form a unique fingerprint.

  • Cite this